[talk-au] Proposed deletion of part of the Gwydir River

[Warin]

On 25/06/19 10:47, Ian Sergeant wrote:
> I'm with Andrew on this one.  It sounds like your research is likely 
> superior to any other recent survey done in the area, and we're not 
> wikipedia here - we value ground truth / original research and it 
> would be a shame it it couldn't be mirrored in the map.
>
> Personally, I'd change it to
>
> waterway=no
> note="blah"
>
> because otherwise an armchair mapper will put it back (and I would 
> too, guilty as charged).  It's ugly and non-standard, but I'd do it 
> anyway.

+1
I'd use life cycle tagging

abandoned/disused/whatever

disused:waterway=river
note=While present on map, it is not present on the ground - even as an 
old river bed?

I too would be re entering it from the LPI data ... guilty and in error. 
Really needs something in OSM to say it is not here. If it floods then 
there may be a 'river' .. a seldom seen event?
>
> Ian.
>
> On Mon, 24 Jun 2019 at 22:52, Andrew Harvey <andrew.harvey4 at gmail.com 
> <mailto:andrew.harvey4 at gmail.com>> wrote:
>
>     I think you've done a top job detailing the situation, so I'd go
>     with your findings from on the ground.
>
>     We're not here to simply mirror the NSW LPI Base Map, so I
>     wouldn't worry too much about what it says.
>
>     On Mon, 24 Jun 2019 at 18:25, cleary <osm at 97k.com
>     <mailto:osm at 97k.com>> wrote:
>
>         In the past, I added some parts of the Gwydir River to the map
>         using the NSW LPI Base Map because I could not see a clear
>         waterway on satellite imagery. Since then, I have visited the
>         area twice and cannot actually find a river where it is shown
>         on the map. Much of the "river" is in private property but
>         public roads cross waterways at various locations.
>
>         The western end of the Gwydir River seems not to exist except
>         on the NSW LPI Base Map and maps which have used it as a
>         source (including OSM).
>
>         As far as I can ascertain, the river used to dissipate into
>         wetlands and, if there was enough water, the seepage from the
>         wetlands re-formed into waterways. However intensive
>         irrigation has resulted in such low water flow that the
>         wetlands are largely dust and water seems never to flow beyond
>         them (except perhaps in major flood events which are
>         relatively rare).  Water from the eastern Gwydir may flow west
>         to the Barwon River via Carole Creek into Gil Gil Creek, via
>         the Gingham Watercourse and via the Mehi River.  But the
>         so-called Gwydir River, west of the wetlands, does not appear
>         to exist except on the LPI Map. And part that of the waterway
>         that does exist is signposted by the Moree Plains Shire
>         Council with a different name (Big Leather Watercourse) at the
>         two places where it crosses public roads.  GNB uses this name
>         for another branch of the river nearer to Moree but locals,
>         including the local council, seem to have a different view.
>
>         When visiting the area, I found water to be difficult to
>         discuss with locals as there are some strong points of view.
>         Maintaining a river on the map may be a political imperative
>         for government but is not consistent with OSM's philosophy of
>         mapping what is actually on the ground at particular locations.
>
>         After reflection, I think the Gwydir River does not really
>         exist west of the wetlands and I think it should be deleted
>         from OSM, even though it is shown on the LPI Base Map. I
>         propose to delete this section of the river and follow the
>         local council signposted name for the more westerly waterway
>         that does actually exist at Morialta and Watercourse Roads.
>
>         I would appreciate any views on this issue.
>

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